.\" Copyright (c) 2016 The FreeBSD Foundation
.\"
.\" This software was developed by Andrew Turner under
.\" sponsorship from the FreeBSD Foundation.
.\"
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.\" modification, are permitted provided that the following conditions
.\" are met:
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.Dd July 29, 2020
.Dt ARMV8CRYPTO 4 aarch64
.Os
.Sh NAME
.Nm armv8crypto
.Nd "driver for the AES accelerator on ARM CPUs"
.Sh SYNOPSIS
To compile this driver into the kernel,
place the following lines in your
kernel configuration file:
.Bd -ragged -offset indent
.Cd "device crypto"
.Cd "device armv8crypto"
.Ed
.Pp
Alternatively, to load the driver as a
module at boot time, place the following line in
.Xr loader.conf 5 :
.Bd -literal -offset indent
armv8crypto_load="YES"
.Ed
.Sh DESCRIPTION
Starting with the ARMv8 architecture ARM Limited has added optional
cryptography instructions to accelerate AES, SHA-1, SHA-2, and
finite field arithmetic.
.Pp
The processor capability is reported as AES in the Instruction Set
Attributes 0 line at boot.
The
.Nm
driver does not attach on systems that lack the required CPU capability.
.Pp
The
.Nm
driver registers itself to accelerate AES operations for
.Xr crypto 4 .
.Sh SEE ALSO
.Xr crypt 3 ,
.Xr crypto 4 ,
.Xr intro 4 ,
.Xr ipsec 4 ,
.Xr random 4 ,
.Xr crypto 7 ,
.Xr crypto 9
.Sh HISTORY
The
.Nm
driver first appeared in
.Fx 11.0 .
.Sh AUTHORS
.An -nosplit
The
.Nm
driver was written by
.An Andrew Turner Aq Mt andrew@FreeBSD.org .
